Roadway arrangement method for reserving small coal pillars between stope faces
A technology for mining working face and roadway layout, applied in mining equipment, tunnels, surface mining, etc., can solve problems such as damage, inability to provide mining services at the next working face, and increase coal and gas outbursts.
Pending Publication Date: 2021-12-31
CCTEG COAL MINING RES INST
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Problems solved by technology
[0003] In related technologies, due to the restriction of continuous mining, many mines need to prepare the adjacent continuous working face before or during the mining of the previous working face. The empty roadway was severely damaged and could not serve the mining of the next working face. Therefore, a large coal pillar over 20 meters had to be left, resulting in serious resource loss. At the same time, because the roadway was arranged in a high-stress area, it also increased the impact of rock burst, coal and gas. The risk of accidents such as outstanding disasters
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[0037] Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0038] Such as Figure 1 to Figure 4 As shown, the roadway layout method (hereinafter referred to as the roadway layout method) of leaving small coal pillars between the mining face of the embodiment of the present invention comprises the following steps:
[0039] S1: Establish a separation line 9 that divides the first working face 1 into a first segment 11 and a second segment 12 along the mining direction, and divides the second working face 2 into a third segment 21 and a fourth segment 22 .
[0040] Specifically, such as figure 1 As shown, the mining area can be arranged on one side of the main road 8, and multiple working faces can be divided in the minin...
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The invention discloses a roadway arrangement method for reserving small coal pillars between stope faces, which comprises the following steps of: dividing a first working face into a first section and a second section, and dividing a second working face into a third section and a fourth section; digging a transportation roadway, an open-off cut, a third section of air return roadway and an auxiliary roadway of the second working face to construct a first air return system; the third section is stoped, a fourth section air return way is excavated, and ventilation is conducted through a first air return system during stoping of the third section; retaining or filling the auxiliary roadway; if the auxiliary roadway is filled, the transportation roadway, the open-off cut and the fourth-section air return roadway form a second air return system, the fourth-section stoping is ventilated through the second air return system, or if the auxiliary roadway is reserved, the auxiliary roadway, the open-off cut and the fourth-section air return roadway form a third air return system, and the fourth-section stoping is ventilated through the second air return system and the third air return system. According to the roadway arrangement method, the recovery rate is increased, excavation continuing is relieved, and prevention and control of dynamic disasters such as rock burst are facilitated.
Description
technical field [0001] The invention relates to the technical field of coal mining, in particular to a roadway layout method in which small coal pillars are left between mining working faces. Background technique [0002] Reasonable setting of section coal pillar width is a major scientific and technical problem faced by coal mines. Reasonable section coal pillar width setting needs comprehensive consideration of mining continuity, disaster management and coal resource recovery rate. The use of small coal pillars of 3-20 meters is of great significance to the improvement of resource recovery rate and the prevention and control of rock burst disasters, and is currently a relatively advocated retention method. [0003] In related technologies, due to the restriction of continuous mining, many mines need to prepare the adjacent continuous working face before or during the mining of the previous working face. The empty roadway was severely damaged and could not serve the mining...
Claims
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IPC IPC(8): E21D9/14E21C41/18
CPCE21D9/14E21C41/18
Inventor 夏永学潘俊锋冯美华陆闯张晨阳
Owner CCTEG COAL MINING RES INST