带压煤层开采底板裂隙发育深度综合研究
Comprehensive Research on Floor Fracture Development Depth in Mining Under Pressure
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摘要: 为了分析带压煤层开采底板岩体破坏规律，选择成庄矿为工程现场，通过对其不同深度主采煤层底板采动破坏情况经行数值模拟，以及对工程现场底板裂隙实际发育深度的注水试验探测，综合研究带压煤层开采底板裂隙演化规律。结果表明：煤层埋深与煤层采厚对底板裂隙的发育影响不大，工作面宽度与底板岩性为主控因素，另外，工程试验对数值模拟结果的验证，证明数值模拟可作为一种研究带压煤层底板裂隙发育深度的可靠手段。Abstract: In order to analyze rock failure laws of floor in mining under pressure, choosing Chengzhuang Coal Mine as engineering field, through numerical simulation of floor damage of main coal seams in different depths and water-injection test detection of floor fracture development actual depths, a comprehensive research on floor fracture development laws in mining under pressure is made. The results show that the main influencing factors of coal seam floor damage in mining under pressure are the width of working face and the lithologies of coal seam floor. However, the depth of coal seam and the thickness of mining seam do not much effect on it. Moreover, numerical simulation is proved to be a reliable method to study the depth of coal floor cracks through certification of engineering test.
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