1、翻译部分Stability Research on Small Coal Pillar Protect of Mine Roadwayin Wang Zhuang Coal MineMENG Xiu-feng China University of Mining and Technology Resources andSafety Engineering College Bei ling,China mgymxfPENG Hong China University of Mining and Technology Institute of Electricaland Information E
2、ngineering Bei ling,China Penghong861 Abstract In this thesis, Shanxi Luan Environmental Energy AG Wang zhuang Coal as the basis, with theoretical analysis,numerical simulation of an integrated approach designed to stay on the optimal size of coal pillars, supporting a systematic program of optimal
3、design, Reduce the loss of coal mine and to ensure safety efficient production, Used in the process of deep mining remain narrow pillar gob technology, Proposed the scientific and reasonable determination of pillar size, to ensure stability along the roadway. And put forward along the roadway of the
4、 high strength bolting technology, It is shown by a small pillar to protect road and high strength bolting method in theory can effectively guarantee the stability of deep along the roadway.Keywords narrow pillar; support technology;numerical modeling; pillar width; stability1. INTRODUCTIONCoal is C
5、hinas primary energy, nearly 30 years, coal accounts for more than 70% of energy. In 2008, Chinas output of raw coal 2.62 billion tons, located in the world. With the continuous coal mining, shallow, table Ministry less and less coal resources department, now has turned to deep coal mining. As more
6、and more to the deep coal mining development, Deep Mine stability, stress and then more and more prominent. As the coal mining depth, intensity increased, and the large demand for energy, and many deep mines in mined areas generally use the left side of the roadway narrow pillar gob way. As the mini
7、ng depth increases every year, making it increasingly difficult to maintain along the roadway, a large number of complex and difficult the road and so the protect technology on the roadways acquire higher, more stringent II. This restricts the advancing speed of the face, serious impact on the effic
8、iency building of the face. Although the past few years scientific research departments, universities and production sites to enhance the process of deep coal mining, roadway protect research also achieved some success, but for the along the deep roadway stability lack of knowledge. In addition, the
9、 roadway to determine coal pillar coal mine has been plagued by production and management, most of the coal mine only experience to be determined. To or by leaving coal pillar size too large causing the loss of coal resources, or due . to oversized Small causing serious instability pillar deformatio
10、n 1,2 Therefore, it is necessary to determine the size of thecoal pillar and along the roadway in the way of support.2. INTRODUCTION OF WANG ZHUANG COAL MINEWang coal mine located in Shanxi Changzhi suburbs, under Shanxi Luan Environmental Energy AG., Annual production of coal is 7.1 million tons. W
11、angzhuang coal Covered depth 140 m 300m,coal seam thickness of 5.5 m 7.12 m, average of 6.5 m, Angle 2.57 0, average of 3 0, coal Plats coefficient f = 1.0 2.5; false roof; carbonaceous shale thickness of 0.lm 0.4m, the local no false roof; immdiate roof, sandy mudstone, thickness 0m 9m, a
12、verage of 5.5m, black, jointed bedding is not developed, and sometimes non-existent; main roof is 3m25m, average of 16.5m, dark gray, medium grain hard, with a layer 4 layer parting.3. THE REASONABLE DETERMINE OF GOB-SIDE NARROW PILLARConsider increasing the force in the anchoring and supporting the
13、 role of the premise, pillar width is the main factors of tunnel surrounding stability, it is essential to determining reasonable pillar width. In order to reduce the roadway closer to the rate, in order to maintain the stability of roadway to reduce the loss of coal Jillars, section of Lanes Pillar
14、 should be as small as possible 2.If Pillar is too small, due to the role of the high stress, coal pillar burst fracture may be installed in the brokn, resulting anchoring force weaken, to reduce the supporting role. In accordance with the help of two coal seam stress and limit equilibrium
15、 theory, the width of Pillar relationship with the surrounding rock deformation can be calculated reasonably Pillar width.A. The basic principles of gob-side narrow pillar width emptyThe rational choice of Roadway along the narrow pillar width is one of the key links for along the roadway excavation
16、 and support technology. Pillar size is too large or too small is not conducive to the supporting and maintenance of roadway; according to the supporting pinciple . of roadway the narrow pillar, width of narrow coal pillar design must meet the following requirements3. Help Roadway bolting to ensure roadway relatively complete, loose small scope, and give full play the role of anchor bolt and the bearing capacity of rock i
