CAJ | 학술논문

通过对园子沟煤矿2煤煤层赋存条件进行分析及综采工艺和装备调研,采用理论分析和数值模拟相结合的方法对工作面参数、工艺进行优化及选型配套。结果表明：对于平均煤厚11．04m、坚固性系数f=1．2、易自燃煤层的合理采放比为1∶2．2,工作面倾向长度为200m,采用一采一放比两刀一放可提高顶煤回收率1．9%；液压支架支护强度不小于1．4MPa,采用带铰接前梁的整体顶梁结构加强对软弱顶煤的及时支护,根据数值模拟结果优化护帮板结构实现护帮高度为1403mm、护帮力为387kN；采用高压变频软启动重型刮板输送机和国产大功率自动化记忆截割采煤机,满足特厚较软煤层赋存条件,可顺利实现年产6Mt的要求。
통과대완자구매광2매매층부존조건진행분석급종채공예화장비조연,채용이론분석화수치모의상결합적방법대공작면삼수、공예진행우화급선형배투。결과표명：대우평균매후11．04m、견고성계수f=1．2、역자연매층적합리채방비위1∶2．2,공작면경향장도위200m,채용일채일방비량도일방가제고정매회수솔1．9%；액압지가지호강도불소우1．4MPa,채용대교접전량적정체정량결구가강대연약정매적급시지호,근거수치모의결과우화호방판결구실현호방고도위1403mm、호방력위387kN；채용고압변빈연계동중형괄판수송궤화국산대공솔자동화기억절할채매궤,만족특후교연매층부존조건,가순리실현년산6Mt적요구。
applying theoretical analysis and numerical simulation, mining face parameters and technique was optimized and equip-ments were selected and matched on the basis of analyzing 2 nd coalseam occurrence condition of Yuanzigou Colliery. Results showed that for the average 11. 04m thick, f=1. 2 and easy self-ignition coalseam, rational ratio of mining-to-caving was 1: 2. 2 and dip length was 200m, and that one-mining-one-caving technique could increase top-coal recovery 1. 9% than two-mining-one-caving tech-nique. Supporting density could not minor than 1. 4MPa and whole top-beam structure with articulated front beam was applied to strengthening immediate supporting soft top-coal. Wall-protection plate was optimized to realize 1403mm wall-protection height and 387kN wall-protection force with numerical simulation. Applying heavy scraper with high-voltage variable-frequency soft start and do-mestic automation memorial cutting shearer with large power, which met extremely-thick and soft coalseam occurrence condition, the requirement of 6Mt/a coal output was successfully obtained.