Exploration, Degassing, and Service Hole Drill RIG SBR-400

Seismological Survey of the Coal Fields Based on the Applying of the Low-Power Sources of Oscillation

“…1. This studies supplement information that can be obtained by applying injection fall-off tests [2] or determining the gas content of coal seams in desorption tests [3], to improve the efficiency of their degassing and following up utilization of coalmine methane [4][5][6][7][8][9][10][11][12][13][14][15].…”

Study of the Interaction of a Packing Device with a Coal Seam at Interval Hydraulic Fracturing

“…The gas-releasing ability of loaded coal seams can be raised by improving their reservoir properties based on the interval hydraulic fracturing method [10,11]. New means of implementing this technology have been developed, laboratory studies and the first experimental tests in a coal mine have been performed [17].…”

“…When execution of interval hydraulic fracturing of a coal seam, difficulties arise associated with the deviation of the cross-sections of degassing wells from a circular shape [16], including due to the bending of the rod during drilling [19]. Moreover, the currently available borehole seals, made in the form of elastically expanding sleeves, do not provide reliable operation of the device at high pressures of the working fluid and unstable dimensions of the well (from 93 to 105 mm).…”

“…By analogy with oil extraction technologies, it was proposed to use the method of influence on a coal massif by directed hydraulic separation of the seam from the free surface [4]. Subsequently, this method was used in various versions from underground mine workings through existing degassing wells, which is the subject of numerous theoretical and practical studies [10][11][12][13][14][15][16][17][18].…”

Finite Element Analysis of Crawler Frame of the Rotary Drill Bits

“…Rotary drill bit is the main open-air mining drilling equipment, which crushes the rock with roller bit and eliminating slag by using pressure air. Compared to the other types of drilling equipment, the rotary drill has many advantages, such as higher drilling efficiency, lower cost and better security, etc [1][2]. Crawler frame is one of the important support parts for rotary drill bits, which bear the whole weight and external loads in the form of concentrated load delivered to the crawler frame, then the loads through rollers, track shoes will be delivered to the ground in the form of uniform loading, so the crawler frame of the rotary drill bits should have sufficient strength to meet the stability of the whole machine [3][4][5].…”