山西煤炭
山西煤炭
산서매탄
SHANXI COAL
2011年
11期
26-28
,共3页
长壁开采%三巷道%力学模型%支承压力%数值计算
長壁開採%三巷道%力學模型%支承壓力%數值計算
장벽개채%삼항도%역학모형%지승압력%수치계산
long-wall mining%3-roadway%mechanical model%supporting pressure%numericalcalculation
采用数值模拟方法,对工作面三掘进巷道基本顶在工作面不同回采阶段的结构破断特征研究构表明:工作面回采过程中,基本顶岩层对上覆软弱岩层的运动起到了控制作用,上覆软岩的运动跟基本顶一致;三掘进巷道开挖后,先在巷道的顶板出现破坏区,随后底板也出现局部破坏;上区段工作面回采后,中阃回采巷道的帮部出现破坏区域,且靠近采空区域的破坏程度更大,基本顶在煤柱上方破断形成块体结构,煤柱靠近采空区域出现大范围的破坏区;下区段工作面回采后,中间巷道围岩破坏区域加大,基本顶仍然在煤柱上方破断形成块体结构,两煤柱靠近采空区域都有大范围的破坏区。
採用數值模擬方法,對工作麵三掘進巷道基本頂在工作麵不同迴採階段的結構破斷特徵研究構錶明:工作麵迴採過程中,基本頂巖層對上覆軟弱巖層的運動起到瞭控製作用,上覆軟巖的運動跟基本頂一緻;三掘進巷道開挖後,先在巷道的頂闆齣現破壞區,隨後底闆也齣現跼部破壞;上區段工作麵迴採後,中閫迴採巷道的幫部齣現破壞區域,且靠近採空區域的破壞程度更大,基本頂在煤柱上方破斷形成塊體結構,煤柱靠近採空區域齣現大範圍的破壞區;下區段工作麵迴採後,中間巷道圍巖破壞區域加大,基本頂仍然在煤柱上方破斷形成塊體結構,兩煤柱靠近採空區域都有大範圍的破壞區。
채용수치모의방법,대공작면삼굴진항도기본정재공작면불동회채계단적결구파단특정연구구표명:공작면회채과정중,기본정암층대상복연약암층적운동기도료공제작용,상복연암적운동근기본정일치;삼굴진항도개알후,선재항도적정판출현파배구,수후저판야출현국부파배;상구단공작면회채후,중곤회채항도적방부출현파배구역,차고근채공구역적파배정도경대,기본정재매주상방파단형성괴체결구,매주고근채공구역출현대범위적파배구;하구단공작면회채후,중간항도위암파배구역가대,기본정잉연재매주상방파단형성괴체결구,량매주고근채공구역도유대범위적파배구。
By numerical simulation, the study on basic roof fracture of 3-driving drifts in different mining phases shows: In the process of mining, basic roof strata controls the movement of upper soft strata, which is consistent with the basic roof; After mining start, failure areas occurs in the roof of roadways, then there are failure areas in the floor too; After the mining in upper face, fractures appears in sidewalls of middle roadway, more serious in the vicinity of mined-out areas. The basic roof changes into block structure above the pillars and large-scale fracture of pillars appears in the mined-out areas; After the mining in lower face, the fracture in the middle roadways enlarges. Basic roof changes into blocks above the pillars and large-scale fracture happens among the two pillars near the mined-out areas.