外文翻译-复杂地质条件下深部矿井的巷道变形规律及其控制.doc

1、英文原文Surrounding rock deformation regularity of roadway under extremely complicated geological conditions in deep mine and its controlAbstract：By combining the practices of deep mine mining in Changguang Mine field and using the Universal Distinct Element Code3.0（UDEC3.0） numerical computing method,

2、the distribution characteristics of deformation field and stress field as well as the surrounding rock deformation regularity of soft rock roadway are analyzed under extremely complicated geological conditions, a technical principle of bolting to control the surrounding rock of roadway is put forwar

3、d. And also using a dynamic control for surrounding rocks designing method, the supporting parameters and implement plan are rationally determined. The experimental tests have obtained a good controlling result of surrounding rock.Keywords：deep mine, extremely complicated geological condition, surro

4、unding rock deformation, dynamic controlling designIntroductionThe geological conditions of coal seams in China are complicated and varied, the mines with soft rock can be found all over the main coal production provinces and regions, and the coal mines with soft rock exist in the approximate half o

5、f coal fields. With increasing the mining depth of mine, the soft rock roadways of the production mines have such problems as great deformation, great rock pressure and difficult support etc. Changguang Coal field is a typical soft rock coal field and its geological condition is extremely complicate

6、d. With increase of mining depth of mine, U-steel support has been difficult to control the surrounding rock of roadway effectively and the problem of roadway support is more serious.In this paper, the surrounding rock deformation characteristics of roadway under the extremely complicated geological

7、 conditions is analyzed based on the bolting pattern, and the thought of supporting design and dynamic control of surrounding rocks is used to carry out determination of support parameters and design of the implement plan. It is of a great significance for the surrounding rock control of soft rock r

8、oadway.1 Maintenance characteristics of main roadway and geological conditionsIn Changguang Coal field, coal seam C of Permian vauclusian spring group is mining now, the roof of coal seam consists of black arenaceous mud stone with black mud stone and its floor consists of bauxitic mud stone. The pe

9、rcentage of rock expansion is 20.2%31.8% and the compressive strength lies mostly between 937 MPa. And strata are mainly thin bedded strata, the grain is loose, the joint is well developed, the cohesion is weak and it is easy to beweathered and expanded when being caught in water.The rock roadway of

10、 No.7 Mine in -850 level is located in western side of synclinal axis of Niutou Mountain, the buried depth is -920m. Within the excavated range of 530m, there are 15 newly exposed small and great fracture structures, except the fracture structure F702 which has been controlled, among them there are

11、8 normal faults and 7 up throw faults, they are all compressed shearing oblique faults. The fault with drop height of 20m is at a distance from the experimental section of roadway by 30 m, and under influence of the fault structure, the original unstable roof and floor rocks are seriously damaged, m

12、ain phenomena are that strata angle changes greatly, the phenomenon of strata inversion occurs now and then, the cross strata of roadway is seriously and the rock bedding is extremely crushed. According to lithological analysis, the lithological alternative change is frequently, and under a action o

13、f two group of stresses, the lithological strike is positive “S” shape.In view of the basic habitat of drift located in -850m level, the drift has obvious features as follows:The roadway belongs to a typical deep mine roadway, additionally, the surrounding rock stand-by condition of roadway is extre

14、mely complicated, the rock pressure of roadway is obviously increased, and on the engineering view, the roadway belongs to the typical difficult supporting roadway.The roadway is greatly influenced by the fault structure and the stand-by condition of stratum where the roadway is excavated changes gr

15、eatly, thus, the maintenance difficult of roadway may be increased further.The strata angle changes from 15to 80, so that the deformation and pressure of roadway possesses an obvious directionality.The surrounding rock of roadway belongs to extremely unstable complex stratum, the stratum consists ma

16、inly of sandstone, mudstone, shale and its interbed, and the thickness of each slice is small, the bedding is extremely developed and the lithological change is quicker, it is difficult to get hold of real lithology of roadway surrounding rock.2 Surrounding rock deformation regularity of roadway under extremely complicated geological conditions2.1Establishment numerical computing modelThe numerical calculation is carried out using UDEC3.0 large size numerical