摘要
在分析华亭矿区陈家沟煤矿开采、地形等条件的基础上,选择井下仰深孔高压输水、内置式输气、双端封堵、均压测漏设备,进行陈家沟煤矿分层综放开采工作面3201、3202覆岩导水裂隙带高度观测,观测的最大裂采比为11.39;结合数值模拟分析和地表裂缝观测成果,分析给出适合陈家沟煤矿特厚煤层分层综放开采条件下的河下开采安全煤岩柱厚度计算公式。研究成果为华亭矿区水体下安全开采提供了可靠的依据。
Base on the analysis on the mining and topography and other condition of the Chenjiagou Mine in Huating Mining Area,the high pressurized water input in the upward deep hole,built-in gas transportation,double end sealing,constant pressure leakage measuring equipment were selected for the observation of the water flow crack zone height in the overburden strata of No.3201 and No.3202 fully mechanized top coal caving mining faces in the slices of thick seam of Chenjiagou Mine.The max cracking and mining ratio observed was 11.39.in combination with the numerical simulation analysis and the surface ground crack observation results,a formula to calculate the coal and rock pillar thickness for safety mining under the river was analyzed and provided for the fully mechanized top coal caving mining in slice of the ultra thick seam in Chenjiagou Mine.The study achievements provided the reliable basis to the safety mining under the water body in Huating Mining Area.
出处
《煤炭工程》
北大核心
2011年第12期4-7,共4页
Coal Engineering
基金
陕西省教育厅重点实验室科学研究计划项目(2010JS020)
陕西省自然科学基金项目(2011JY005)
关键词
仰深孔观测
裂采比
导水裂缝带
水体下开采
upward observation deep hole
crack and mining ratio
water flow crack zone
coal mining under water body
