The present invention discloses a zero-gangue-discharge short-wall face pillar-free mining method, which is applicable to zero-gangue-discharge disposal in the mining operation in a mine shaft. A short-wall face is arranged in a selected area near a mine shaft according to the actual conditions of the mine shaft, the short-wall face is mined in a fully mining and fully back-filling mode, the gangues produced at other mining faces of the mine shaft are filled into the short-wall face, the short-wall face is supported with anchor rods along the edge of the filling face and the solid coal side to form an entry, and the entry is utilized to mine an adjacent working face. The method in the present invention mainly displaces the coal mass with gangues and thereby maximizes the utilization of the resources; in addition, the method can fully control the roof and realize mining without damage to the rock formation. Therefore, the method is of great value for wide application.

The present invention discloses a zero-gangue-discharge short-wall face pillar-free mining method, which is applicable to zero-gangue-discharge disposal in the mining operation in a mine shaft. A short-wall face is arranged in a selected area near a mine shaft according to the actual conditions of the mine shaft, the short-wall face is mined in a fully mining and fully back-filling mode, the gangues produced at other mining faces of the mine shaft are filled into the short-wall face, the short-wall face is supported with anchor rods along the edge of the filling face and the solid coal side to form an entry, and the entry is utilized to mine an adjacent working face. The method in the present invention mainly displaces the coal mass with gangues and thereby maximizes the utilization of the resources; in addition, the method can fully control the roof and realize mining without damage to the rock formation. Therefore, the method is of great value for wide application.

A mine exploitation method based on stoping, separation and filling control is disclosed herein. The method includes deploying a gangue-less coal mining system; choosing a suitable coal and gangue separation method according to a separation requirement; choosing a suitable filling method according to mine geology, production conditions and rock stratum control requirement; reversely calculating a filling rate according to gangue discharge requirement and control indexes by utilizing theoretical calculation, simulation and experiment; determining a filling process and a separation process according to the filling rate; and feeding back and adjusting the filling process and separation process parameters by monitoring filling and control effect indexes.

A mine exploitation method based on stoping, separation and filling control is disclosed herein. The method includes deploying a gangue-less coal mining system; choosing a suitable coal and gangue separation method according to a separation requirement; choosing a suitable filling method according to mine geology, production conditions and rock stratum control requirement; reversely calculating a filling rate according to gangue discharge requirement and control indexes by utilizing theoretical calculation, simulation and experiment; determining a filling process and a separation process according to the filling rate; and feeding back and adjusting the filling process and separation process parameters by monitoring filling and control effect indexes.

A stress-transfer method in tunnel with high ground pressure based on fracturing ring. According to the stress source of the tunnel, fracturing by drilling holes to form artificial weaken zones in surrounding rocks, that's named fracturing ring. The fracturing ring is the weaken zone with some width, whose inner boundary is the protective circle. The fracturing ring with small width is called the cutting and interruption circle and the cutting or interruption arc. The radius of the protective circle is determined by setting a certain width of safety coal pillar barriers at the edge of a support body. The radius of the fracturing ring is determined by the surrounding rock structure and the stress conditions as well as the construction technology. Usually, the higher the stress, the wider the radius of the fracturing ring. The cutting and interruption circle or arc could cut off all of the targeted rock which transmits the stress.

The present invention relates to a clean and efficient coal mining method, which is applicable to the field of solid waste treatment in mines. The method is characterized in: the width of short-segment working faces is designed according to the discharge volume of solid wastes produced in a mine, including downhole gangue and surface coal ash; first, two adjacent short-segment working faces are mined and backfilled, and the edges of the filling face and the solid coal side are supported with anchor rods while roadways are retained; the roadways retained at the two short-segment working faces and the coal mass in the middle constitute a long-segment working face mining system; the long-segment working face is mined, the short-segment backfilled working faces at the two sides are mined and backfilled at the same time, and the gangue produced at the long-segment working face is transported to the short-segment working faces to fill, so that a continuous mining system that consists of backfill mining at short-segment working faces and efficient stopping at long-segment working faces is realized. The method provided in the present invention can deal with all surface and downhole solid wastes in a mine, reduces the cost of gangue treatment, and mitigates damages to the ecological environment; besides, the method utilizes solid wastes to fill the gobs to form roadways, eliminates coal pillars and improve resource recovery rate.

Provided is a filling mining method for a fully-mechanized top coal caving working face, which relates to the field of mining engineering technologies. The method solves the technical problems of roof control of the fully-mechanized top coal caving working face and a large ground deformation of top coal caving mining. The method includes the following steps: at step A, dividing the fully-mechanized top coal caving working face into a filling zone and a top coal caving zone along a strike of the working face, or dividing the working face into a filling zone and a top coal caving zone along a strike and an inclination of the working face; at step B, determining a cycle interval of the working face; at step C, performing supporting for the filling zone before the working face, and completing coal caving in the top coal caving zone and performing round wood supporting in the filling zone; at step D, after the filling zone reaches the filling interval, disposing a filling tarpaulin behind a hydraulic support and pumping the filling paste; at step E, repeating steps C and D to complete mining. A mining method of alternate coal caving and filling is provided to complete the filling mining of the top coal caving working face. In this way, the roof is effectively controlled, ground subsidence is reduced and advantages such as safety and high efficiency are available.

Provided is a filling mining method for a fully-mechanized top coal caving working face, which relates to the field of mining engineering technologies. The method solves the technical problems of roof control of the fully-mechanized top coal caving working face and a large ground deformation of top coal caving mining. The method includes the following steps: at step A, dividing the fully-mechanized top coal caving working face into a filling zone and a top coal caving zone along a strike of the working face, or dividing the working face into a filling zone and a top coal caving zone along a strike and an inclination of the working face; at step B, determining a cycle interval of the working face; at step C, performing supporting for the filling zone before the working face, and completing coal caving in the top coal caving zone and performing round wood supporting in the filling zone; at step D, after the filling zone reaches the filling interval, disposing a filling tarpaulin behind a hydraulic support and pumping the filling paste; at step E, repeating steps C and D to complete mining. A mining method of alternate coal caving and filling is provided to complete the filling mining of the top coal caving working face. In this way, the roof is effectively controlled, ground subsidence is reduced and advantages such as safety and high efficiency are available.

A system and a method are provided for drilling pathways to mine for solid natural resources from an elevated terrain. The system includes a drill bit, at least one reamer, and a diverter. The drill bit allows for drilling into a seam of natural resource that is found within a mountain. The at least one reamer enlarges a transversal access hole that is drilled to access the seam of natural resource. The diverter separates cuttings from any waste material as the cuttings are excavated from the seam of natural resource. There are two methods that can be used to mine for solid natural resources from an elevated terrain. The typical auger method drills transversal access holes directly into the seam of natural resource. The directional engineering auger method drills the transversal access hole from a diagonal wellbore into the seam of natural resource.

A system and a method are provided for drilling pathways to mine for solid natural resources from an elevated terrain. The system includes a drill bit, at least one reamer, and a diverter. The drill bit allows for drilling into a seam of natural resource that is found within a mountain. The at least one reamer enlarges a transversal access hole that is drilled to access the seam of natural resource. The diverter separates cuttings from any waste material as the cuttings are excavated from the seam of natural resource. There are two methods that can be used to mine for solid natural resources from an elevated terrain. The typical auger method drills transversal access holes directly into the seam of natural resource. The directional engineering auger method drills the transversal access hole from a diagonal wellbore into the seam of natural resource.