矿业安全与环保
礦業安全與環保
광업안전여배보
MINING SAFETY & ENVIRONMENTAL PROTECTION
2015年
2期
6-11
,共6页
高压逾裂%渗流-应力耦合%煤层注水%数值模拟%深井%卸压
高壓逾裂%滲流-應力耦閤%煤層註水%數值模擬%深井%卸壓
고압유렬%삼류-응력우합%매층주수%수치모의%심정%사압
high-pressure gradual splitting%seepage-stress coupling%water infusion in coal seam%numerical simulation%deep mine%stress relief
淄博矿业集团唐口煤矿毗邻济宁市区，地面村庄压煤比较严重，为保证矿井的正常生产接续，该矿采煤工作面一般采用90 m面长的条带面。由于唐口煤矿为千米深井，煤层具有冲击倾向性，且煤层孔隙率小、地应力大，因此可采用煤层注水工艺达到卸压的目的。首先构建了以煤体的流固耦合方程、液体流在多孔介质的连续性方程为基础的煤层注水数学模型。在建立煤层注水数值模拟几何模型的基础上，根据济北煤田的实际情况，采用ANSYS计算软件对70 m单向长钻孔布置形式在3．5、21．0 MPa两种注水压力条件下的渗流压力场、速度场，以及煤体水分增加情况进行了数值模拟。根据模拟结果，设计了针对唐口煤矿5301工作面的高压逾裂煤层注水技术工艺，取得了较好的卸压效果。
淄博礦業集糰唐口煤礦毗鄰濟寧市區，地麵村莊壓煤比較嚴重，為保證礦井的正常生產接續，該礦採煤工作麵一般採用90 m麵長的條帶麵。由于唐口煤礦為韆米深井，煤層具有遲擊傾嚮性，且煤層孔隙率小、地應力大，因此可採用煤層註水工藝達到卸壓的目的。首先構建瞭以煤體的流固耦閤方程、液體流在多孔介質的連續性方程為基礎的煤層註水數學模型。在建立煤層註水數值模擬幾何模型的基礎上，根據濟北煤田的實際情況，採用ANSYS計算軟件對70 m單嚮長鑽孔佈置形式在3．5、21．0 MPa兩種註水壓力條件下的滲流壓力場、速度場，以及煤體水分增加情況進行瞭數值模擬。根據模擬結果，設計瞭針對唐口煤礦5301工作麵的高壓逾裂煤層註水技術工藝，取得瞭較好的卸壓效果。
치박광업집단당구매광비린제저시구，지면촌장압매비교엄중，위보증광정적정상생산접속，해광채매공작면일반채용90 m면장적조대면。유우당구매광위천미심정，매층구유충격경향성，차매층공극솔소、지응력대，인차가채용매층주수공예체도사압적목적。수선구건료이매체적류고우합방정、액체류재다공개질적련속성방정위기출적매층주수수학모형。재건립매층주수수치모의궤하모형적기출상，근거제북매전적실제정황，채용ANSYS계산연건대70 m단향장찬공포치형식재3．5、21．0 MPa량충주수압력조건하적삼류압력장、속도장，이급매체수분증가정황진행료수치모의。근거모의결과，설계료침대당구매광5301공작면적고압유렬매층주수기술공예，취득료교호적사압효과。
Tangkou Coal Mine of Zibo Mining Group is near to Jining city and the coal mining is influenced by villages seriously. For ensuring the normal production of the mine, 90 m-long strip working face is generally adopted. Since Tangkou Mine is a mine with the mining depth over 1 000 m, the coal seams are prone to burst and have low porosity and large ground stress, water infusion in coal seams may be adopted to achieve the goal of stress relief. A mathematical model of coal seam water infusion was established on the basis of fluid-solid coupling equation of coal and the continuous equation of fluid in porious medium. Based on the establishment of the geometrical model for numerical simulation of coal seam water infusion, numerical simulation was carried out on the seepage pressure field, velocity field and moisture increasement of coal seam under the conditions of 70 m one-way hole as well as 3. 5 MPa and 21. 0 MPa water pressures according to the actual conditions of Jibei Coal field and by using ANSYS softwere. Finally, seam water infusion technology by high-pressure gradual splitting for 5301 working face of Tangkou Mine was designed, and better stress relief effect was achieved.
