静态膨胀生裂增透突出煤层机理及防突应用研究

发布时间：2018-11-03 19:24

【摘要】：针对我国低透气性突出煤层瓦斯抽放难题,提出了静态膨胀生裂技术增加突出煤层透气性系数方法。根据静态膨胀剂膨胀生裂机理,即被膨胀岩体将经历裂隙萌生、裂隙传播和裂隙扩展贯通三个过程,通过测试膨胀力得出:煤矿井下作业条件下,不同类型静态膨胀剂均能产生高达30~50MPa的膨胀力,其产生的压应力和拉应力足以裂开突出煤层及其顶底板岩体。根据对龙家山煤矿K6煤层及顶底板岩体的实验研究,论证了静态膨胀剂均能膨胀裂开煤、灰岩等矿山岩体。通过膨胀裂开突出煤层及其顶底板岩体,静态膨胀生裂技术可以显著提高石门揭煤工作面等作业地点煤层的透气性系数而防治突出。
[Abstract]:In view of the difficult problem of gas drainage in low permeability outburst coal seam in China, a method of increasing gas permeability coefficient of outburst coal seam by static expansion and cracking technology is put forward. According to the expansion and cracking mechanism of static expansive agent, that is, the swelling rock mass will undergo three processes of crack initiation, crack propagation and crack expansion and penetration. Through the test of expansion force, it can be concluded that under the condition of underground operation of coal mine, Different types of static expansive agents can produce expansion forces up to 30~50MPa, and the compressive stress and tensile stress generated by them are sufficient to break open the outburst coal seam and its roof and floor rock mass. Based on the experimental study of K6 coal seam and roof and floor rock mass in Longjiashan coal mine, it is proved that static expansion agent can expand cracked coal, limestone and other mine rock mass. By expanding and cracking the outburst coal seam and its roof and floor rock mass, the static expansion and cracking technology can significantly improve the permeability coefficient of the coal seam in the working places such as Shimen exposed coal face and prevent and control the outburst.
【作者单位】：河北省矿井灾害防治重点实验室;贵州大学矿业学院;贵州大学复杂地质矿山开采安全技术工程中心;
【基金】：国家自然科学基金资助项目(51264004) 贵州省科技厅工业攻关项目(黔科合GY[2012]3054) 河北省矿井灾害防治重点实验室开放基金(KJZH2014k01)
【分类号】：TD713

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