A drilling device for coal mining is provided, including a placement board. The placement board is fixedly connected to a first support pillar and a second support pillar, and the first support pillar and the second support pillar are together fixedly connected to a transmission rod; the transmission rod is connected to support rods symmetrically distributed in a limited sliding manner, and the support rods symmetrically distributed are connected to a connecting rod in a sliding manner; the connecting rod is provided with grooves evenly distributed in a circumferential direction, the grooves are fixedly connected to pneumatic telescopic blocks, and the telescopic end of each pneumatic telescopic block is fixedly connected to an arc-shaped plate. The arc-shaped plate is extended in a circumferential direction to support the drilled hole close to the drill bit, preventing the collapse of the drilling wall close to the drill bit.

A drilling machine including a main body, an operating mechanism; a harmonic speed changer, a centralizer; a drainage tube controlling assembly; a dust collection device, a caterpillar track unit, a drill rod storage frame, and an electric motor-oil pump conversion box. The caterpillar track unit is fixed on both sides of the main body, to move the main body; the operating mechanism and the electric motor-oil pump conversion box are disposed on the main body; the main body includes a main frame provided with a mounting plate; the mounting plate is connected to the operating mechanism through a rotary speed changer; the electric motor-oil pump conversion box is disposed on one side of the operating mechanism. The operating mechanism includes a sliding frame assembly, a sliding guide rod, a propulsion cylinder, a compensating cylinder, and a power head.

A homogenizer for homogenizing flow, a rock drilling rig, and a method for taking samples is provided. The homogenizer is mountable to a dust collecting system of the rock drilling rig and is arranged for effecting on the flow, which contains air and drilling cuttings. The homogenizer includes a channel part through which the flow is directed and at least one air jet for directing air blows to the flow for generating disturbance in the flow and to thereby homogenize particle distribution of the drilling cuttings in the flow.

A drilling device includes a hydraulic drilling unit, a multi-way connector, a compressed air conduit, a plurality of air compressor units, an air duct, a dust removal unit and an operation bench. The hydraulic drilling unit is capable of moving among a plurality of drilling platforms and among a plurality of hole positions on the plurality of drilling platforms and performing a drilling operation. The plurality of air compressor units are disposed in a fixing and mounting region that is between the plurality of drilling platforms. The dust removal unit includes a dust collection cover and a dust remover, where the dust collection cover is configured to be located at any one of the plurality of hole positions, the dust remover is disposed in the fixing and mounting region, and the dust collection cover and the dust remover are connected through the air duct.

A support includes a support element for supporting a drilling tool used in rock drilling. The support element is inside a suction housing of a rock drilling unit at least during drilling. The support is located at a front end portion of a feed beam and is used to support the tool especially during the collaring phase of the drilling. A method of collaring is disclosed wherein the drilling tool is supported by the support.

A device for preventing abrupt blockage in a blooie line of gas drilling includes a sand-storing tank body, which is connected to a rotating blowout preventer through a guiding tube, and a guiding three-way joint is set between the guiding tube and the sand-storing tank body and connected to the blooie line by a vertical guiding tube; the sand-storing tank body is connected to the blooie line by means of a gas discharge tube; a flap plate assembly is arranged at the position fronting straight onto the guiding three-way joint inside the sand-storing tank body, and configured to control the rock particles in the guiding tube to enter the sand-storing tank body, preventing blockage in the blooie line.

A device for extracting drilling sludge for use at difficult to access locations on a building site includes a main body. The main body has a cavity on a lower side of the main body and a drilling sludge that is disposed in the cavity during a use of the device is extractable from the cavity by a suction device. The main body also has an extraction opening which opens into the cavity.

A method for monitoring performance of a dust collector of a drilling apparatus, the method including providing suction by a suction device for drawing air from a drill hole into a dust collector, collecting dust with a filter from the air drawn from the drill hole, monitoring input power of the suction device, transmitting input power data to a controller, and selecting an action automatically by the controller if the input power is decreased. A dust collecting arrangement of a drilling apparatus is also provided.