Pre-evalution research of using coal seam water injection to control strong pressure in Zhaozhuang Coal Mine
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摘要: 为了评估采用煤层注水治理赵庄矿3号煤层强矿压的效果，开展了煤层注水治理强矿压的预评价研究。对3号煤层试样含水率、吸水率、普氏系数等注水参数进行实验测试，分析3号煤层注水的可行性；测试分析试样浸水前后的抗压强度绝对变化量和变化速率，分析煤层注水卸压预期效果，并提出注水方案。分析结果表明，3号煤层符合注水条件，且浸水后，煤岩样物理性质发生改变，抗压强度大幅度降低，具有较理想的预期卸压效果。Abstract: In order to assess effect of using coal seam water injection to control strong pressure of No.3 coal seam of Zhaozhuang Coal Mine, pre-evaluation research of using coal seam water injection to control strong pressure was carried out. Water injection parameters including moisture content, water absorption, firmness coefficient of coal sample and so on were tested to analyze feasibility of water injection of No.3 coal seam. Absolute variation and change rate of compressive strength of test sample before and after soaking were test to analyze expected pressure-relief effect of water injection and propose injection project. The analysis result shows that No.3 coal seam can meet the conditions of water injection, and after soaking, physical properties of coal and rock samples are changed, compressive strength is reduced greatly, which indicates water injection has desired expected pressure-relief effect.
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Keywords:
- coal seam water injection /
- strong pressure /
- moisture content /
- pre-evaluatio
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