采矿与安全工程学报Issue(1)：7-13,7.DOI:10.13545/j.cnki.jmse.2015.01.002
覆岩多层坚硬顶板条件下特厚煤层综放工作面支架阻力确定
Support resistance determination of fully mechanized top-coal caving face in extra thick seam under multi-layered hard strata
摘要
Abstract
In this paper, to clarify the mining pressure behavior mechanism of the coal face in ex-tra-thick coal seam under the multilayered hard overlying strata, and determine the support resistance reasonably, the multilayered roof breaking law and the support resistance in the extra-thick seam were studied, and the determination principle and calculation method of support resistance were obtained, by using the methods of theoretical analysis, similar simulation and field practice. The results show that the breaking form and breaking order of the multilayered hard roof have obvious influence on the mining pressure behavior, and the support resistances corresponding to single-layer key stratum caving and multi-layer stratum synchronous instability are different It will be difficult to meet the support require-ments in extra-thick seam by simply improving the support resistance in the condition of multi-layer <br> stratum synchronous instability. Take one coal face in Datong Mining Area for example, though the reasonable support selection in the extra-thick coal seam and using hydraulic fracturing technology for the hard strata, it has achieved good effect for roof control.关键词
坚硬顶板/特厚煤层/支架阻力/组合悬梁/顶板破断形式Key words
hard roof/extra-thick coal seam/support resistance/composite cantilever beam/roof breaking form分类
矿业与冶金引用本文复制引用
刘长友,杨敬轩,于斌,吴锋锋..覆岩多层坚硬顶板条件下特厚煤层综放工作面支架阻力确定[J].采矿与安全工程学报,2015,(1):7-13,7.基金项目
国家自然科学基金项目(51174192)；江苏省研究生培养创新工程项目(CXLX12_0964)；泰山学者建设工程专项项目(201309) （51174192）
