The present disclosure relates to the technical field of mine ventilation, and in particular, to a three-dimensional ventilation method and system for mining by 110 construction method in coal and gas outburst mines. The three-dimensional ventilation method comprises: constructing a first process roadway and/or a second process roadway before stopping the working face; forming a first roof-cutting and roadway retaining section by a part of the working face track gate located in the goaf, and/or forming a second roof-cutting and roadway retaining section by a part of the working face transport gate located in the goaf during the stopping process of the working face, so that the air inlet of the first roof-cutting and roadway retaining section enters the gas drainage air return roadway through the first process roadway to form return air, and/or the inlet air of the second roof-cutting and roadway retaining section enters the gas drainage air inlet roadway through the second process roadway to form return air, the three-dimensional ventilation system is constructed by using the gas drainage air inlet roadway and the gas drainage air return roadway, during the conversion from the 121 construction method to the 110 construction method, a complete ventilation system can be formed in the roadway retaining section, real-time monitoring of the roadway retaining section can be carried while eliminating harmful gas accumulation in the retaining section.

A ventilation system including a building having a space inside, a subterranean facility arranged in a basement of the building and having a subterranean space inside, a communication passage establishing communication between the space and the subterranean space, and a ventilation hole establishing communication between an earth outside the building and the subterranean space is provided. A fuel cell unit having an exhaust port is arranged in the subterranean space. The communication passage has a lateral wall protruding downward from a ceiling of the subterranean space. The lateral wall is arranged on the exhaust port side when the communication passage is arranged on a straight line linking the exhaust port and a second opening portion of the ventilation hole on the subterranean space side. The lateral wall is arranged on the straight line side when the communication passage is arranged at a position spaced apart from the straight line.

An on-track work or rescue vehicle for fire-fighting and/or the rescue of persons in tunnels or subway tubes has a drive which can be operated for at least a limited duration without ambient air. A liquid tank is arranged on the work or rescue vehicle. A fan blower with a fluid spraying device is connected to the liquid tank for producing a spray mist. The work or rescue vehicle is a traction vehicle for pulling or pushing other rail vehicles. A work or rescue vehicle of this type can move to a fire source under the protection of the spray mist blown into the tunnel or subway tube and, if required, pull or push a damaged rail vehicle from a danger zone.

A platform door arrangement with a traffic route (1), a railroad platform (2), a partially raised partition (3) between the platform (2) and the traffic route (1) and platform doors (31) arranged in the partition wall (3). The traffic route (1) and the platform (2) are arranged within a housing having a ceiling (22), or within a subway. An air exchange occurs between the traffic route (1) and the platform (2) via a free space (30) between the partially raised partition (3) and the ceiling (22). The free space (30) is closed off in an air permeable manner from above the partially raised partition (3) up to the ceiling (22).

A mine ventilation structure including a support structure, a plurality of side panels and ceiling panels mounted on the support structure, and a cementitious sealing composition applied over at least one surface of the side or ceiling panels. A method of assembling an overcast in an intersection within a mine is also provided.

A roadway conduit system includes a roadway conduit section that includes a floor portion with roadway surface configured to receive traveling vehicles, a ceiling portion, and at least one sidewall portion coupled to the floor portion and the ceiling portion such that the floor, ceiling, and at least one sidewall portions define a roadway conduit volume through which the traveling vehicles traverse the roadway conduit section. The roadway conduit section includes at least two fixedly connected preformed segments. The roadway conduit system also includes a roadway conduit ingress coupled to a first location of the roadway conduit section; a roadway conduit egress coupled to a second location of the roadway conduit section; and at least one air mover configured to circulate an airflow in the roadway conduit volume in a direction of at least one of the traveling vehicles.

A roadway conduit system includes a roadway conduit section that includes a floor portion with roadway surface configured to receive traveling vehicles, a ceiling portion, and at least one sidewall portion coupled to the floor portion and the ceiling portion such that the floor, ceiling, and at least one sidewall portions define a roadway conduit volume through which the traveling vehicles traverse the roadway conduit section. The roadway conduit section includes at least two fixedly connected preformed segments. The roadway conduit system also includes a roadway conduit ingress coupled to a first location of the roadway conduit section; a roadway conduit egress coupled to a second location of the roadway conduit section; and at least one air mover configured to circulate an airflow in the roadway conduit volume in a direction of at least one of the traveling vehicles.

The present disclosure relates to the technical field of coal mining, and in particular, to a mining method without coal pillars with roof-cutting and roadway retaining, comprising: constructing a gas drainage roadway and eliminating outbursts in a working face transport gate area and a working face track gate area on opposite sides of a first mining working face; constructing the working face track gate, the working face transport gate, a first process roadway and a second process roadway, one end of the working face track gate is communicated with an air return roadway, the other end is communicated with the gas drainage roadway by the first process roadway, one end of the working face track gate is communicated with the air return roadway, the other end is communicated with the gas drainage roadway by the second process roadway; stoping the working face, forming an roadway retaining section, the roadway retaining section is communicated with the gas drainage roadway by the first process roadway and the second process roadway, forming a ventilation system. Make full use of the existing gas drainage roadway to meet the roadway layout requirements using the 110 construction method, increasing the use function of the roadway and increasing the reuse rate of the roadway, reducing the roadway engineering quantity before production, shortening the construction period and reduce the cost.

The present disclosure relates to the technical field of coal mining, and in particular, to a mining method without coal pillars with roof-cutting and roadway retaining, comprising: constructing a gas drainage roadway and eliminating outbursts in a working face transport gate area and a working face track gate area on opposite sides of a first mining working face; constructing the working face track gate, the working face transport gate, a first process roadway and a second process roadway, one end of the working face track gate is communicated with an air return roadway, the other end is communicated with the gas drainage roadway by the first process roadway, one end of the working face track gate is communicated with the air return roadway, the other end is communicated with the gas drainage roadway by the second process roadway; stoping the working face, forming an roadway retaining section, the roadway retaining section is communicated with the gas drainage roadway by the first process roadway and the second process roadway, forming a ventilation system. Make full use of the existing gas drainage roadway to meet the roadway layout requirements using the 110 construction method, increasing the use function of the roadway and increasing the reuse rate of the roadway, reducing the roadway engineering quantity before production, shortening the construction period and reduce the cost.

A conduit segment casting mold system includes at least one inner mold; at least one outer mold configured as at least two outer mold sections of opposed shapes that define a cavity between the at least two outer mold sections that is sized to at least partially enclose the at least one inner mold, each of the at least two outer mold sections including a respective mating surface, each of the at least two outer mold sections including at least one hole sized to receive a cable, and the at least one hole of a particular one of the at least two outer mold sections is aligned with the at least one hole of another particular one of the at least two outer mold sections when the mating surfaces of the particular one and the another particular one of the at least two outer mold sections are mated; and a mold base.