急倾斜厚煤层102m阶段煤体综放开采煤体致裂综合分析  

Comprehensive analysis of coal break on steep and thick coal seam 102m section

作　　者：来兴平[1,2] 吴学明[1,2] 伍永平[1,2] 崔峰[1,2] 曹建涛[1,2] 蔡延芳[1,2] 

机构地区：[1]西安科技大学能源学院,陕西西安710054 [2]西安科技大学教育部西部矿井开采及灾害防治重点实验室,陕西西安710054

出　　处：《西安科技大学学报》2009年第3期261-265,共5页Journal of Xi’an University of Science and Technology

基　　金：国家自然科学基金项目(10402033;10772144);陕西省岩层控制重点实验室重点资助项目(04JS19)

摘　　要：急倾斜高阶段煤体综放开采技术复杂,结合神新公司苇湖梁煤矿+579E2EB1+2急倾斜(64～69°)厚煤层(32.9m)高阶段(102m)综放工作面顶煤超前预爆破综放开采实践,运用爆破理论分析了孔内爆破的裂隙圈半径与临界抵抗值,采用RSM智能松动声波检测仪和YS(B)光学钻孔窥视仪对弱化煤体孔壁滑行波及爆轰气体应力场产生的径向裂隙等全面检测,辅以弹性波CT成像分析,继续追踪模拟高阶段上位顶煤破裂情况,综合分析表明:爆后除尚存有少量三角煤及顶煤结构外其它范围煤体破裂充分,理论分析与实践检测基本相符,并对爆破后支架最大工作阻力进行了分析对比,急斜高阶段煤体超前松动致裂效果显著。Fully mechanized short-wall mining technology for steep high-level coal is complex. According to the experience of pre-blasting full mechanized working face in Wei Huliang coal mine ＋ 579E2EB1＋2, steep （64 -69°） ,thick coal seam, and high section（102m） top-coal, the radius of fractured zone and resistance are analyzed using the theory of blasting and CT. The instruments of RSM and YS （B） are used to comprehensive testing of weakening coal hole wall and explosive gas, assisted by CT imaging analysis of elastic wave and continue to trace simulated high level upper top-coal fractures. All of these illustrate that the coal in other scope is ruptured well except for few top-coal structure and the tricoru coal, and analysis of the theory is basically consistent with practical tests. The maximum working resistances of supports after blasting is contrasted. All of these indicate that the pre-blasting effect is distinct.

关 键 词：急倾斜厚煤层 102m阶段 超前预爆破 致裂范围检测 CT成像 

分 类 号：TD823.49[矿业工程—煤矿开采]