Observation of Coal Wall Spalling in Coal Face with Large Mining Height and Its Control Measures
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摘要: 为了深入研究大采高工作面煤壁片帮的发生机制并做好控制管理工作，利用激光测距方法对霍尔辛赫煤矿3207工作面煤壁片帮情况进行现场观察，统计了煤壁片帮深度、高度及片帮范围等数据，分析了3207工作面发生片帮的主要原因，并提出相应的煤壁片帮控制措施。研究结果表明：霍尔辛赫煤矿3207工作面煤壁片帮的主要形式为剪切滑移，工作面周期来压对煤壁稳定性影响较大；地质构造、顶底板性质、采煤高度、工作面推进速度等是煤壁发生片帮的主要影响因素。提出采用俯斜开采、加固工作面煤壁、加快工作面推进速度等控制措施，确保3207大采高工作面的安全高效开采。Abstract: In order to deeply study the occurrence mechanism of coal wall spalling in the working face with large mining height and make it under control, the laser ranging method was used for observing the coal wall spalling in 3207 working face in Huoerxinhe Mine, statistics were made on the coal wall spalling depth, height, scope and so on, analysis was carried out on the causes of the coal wall spalling in 3207 working face and corresponding control measures were proposed. The study results showed that the coal wall spalling in 3207 working face in Huoerxinhe Mine was mainly in shearing slip form, and the periodical weighting in the working face had greater impact on the coal wall stability; the geological structure, the lithological characters of roof and floor strata, the mining height and the advancing speed of the working face were the main factors affecting the coal wall spalling; the control measures of using pitching oblique mining, reinforcing the coal wall of the working face, accelerating the advancing speed of the face and so on were proposed so as to ensure the safe and efficient mining of 3207 working face with large mining height.
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