Study of roadside packing to go with gob-side entry retaining technology on crisp surrounding and blasting face in the Xinzhuang mine
Résumé
In order to improve the recycle rate of coal resources, extend the service-life of the mine, and alleviate the tensions of excavation-replacement in the Xinzhuang mine, this paper presents a high-water material for roadside packing to go with gob-side entry-retaining technology on crisp surrounding rock and blasting working face. Based on the conditions in the field, the authors analyzed the utility of the filling structures of the 12011 machine roadway. On the basis of engineering analogy method and laboratory experiment, the authors determined the ZKD new high-water material ratio of each component and the filling process parameters. This research shows that when four conditions are met—rectangular packing is used; water cement ratio of the new high-water material is 1.8:1; the Φ 18 mm × L 3400 mm anchor bolt is imbedded in the filling body; and supplementary support, which consists of anchor bolt, wire rope, and steel beam, is applied—the average contraction rate of the roadway section is 13.38%, achieving a more satisfactory effect. Compared with gob-side entry driving, it can improve the indirect profit by 9.86 million yuan; compared with digging a new roadway, it can increase the profit by 5688.5 yuan per meter.Références
Bai J. (2006).Surrounding Rock Control of Entry Driven along Goaf. Xuzhou, 171p
Bai J., Zhou H., Hou C., Tu X., and Yue D. (2004).Development of support technology beside roadway in goaf-side entry retaining for next sublevel. Journal of China University of Mining and Technology. Volume 33, pp.183-186
Bu T., Feng G., and Jia K.(2010).Gateway Side Backfilling Support Technology of Goaf Side Gateway in Fully Mechanized High Cutting Longwall Mining Face. Coal Science and Technology. Volume 38, pp.41-44
Chen Y., Bai J., and WANG X. (2012). Support technology research and application inside roadway of gob-side entry retaining. Journal of China Coal Society. Volume 37, pp.903-910
He T. (2012).The breaking place prediction of face end main roof flap top in the gob-side entry retaining. Journal of China Coal Society. Volume 25, pp.28-31
Hua X.，Ma J., and Xu T. (2005).Study on controlling mechanism of surrounding rock of gob-side entry with combination of roadside reinforced cable supporting and roadway bolt supporting and its application. Chinese Journal of Rock Mechanics and Engineering. Volume 24, pp.2107-2112
Hua X., Zhao S., and Zhu H. (2006) .Research on combined support technique of gob-side entry retaining. Rock and Soil Mechanics. Volume 27, pp.2225-2228
Ju F., Sun Q., and Huang P. (2014).Study on technology of gob-side entry retaining in thin seam surrounded by soft roof and floor. Journal of Mining and Safety Engineering. Volume 31, pp.914-919
Li J., Feng G., and Ning S. (2009).The technology and application of roadside supporting for gob-side entry retaining in full-mechanized mining. China Mining Magazine. Volume 18, pp.77-79
Qian M., Shi W., and Xu J. (2010).Mining pressure and strata control. Xuzhou, 374p
Tang J., Hu H., and Tu X.（2010）.Experimental on roadside packing gob-side entry retaining for ordinary concrete. Journal of China Coal Society. Volume 35, pp.1426-1429
Xie W., Da J., and Feng G. (2004).Mechanism of controlling surrounding rock around gob-side entry retaining in top-coal caving mining face. Journal of Central South University (Science and Technology), Volume 35, pp. 657-661
Xu J., Zhu W., and Li X. (2006).Study of the Technology of Partial-Filling to Control Coal Mining Subsidence. Journal of Mining and Safety Engineering, Volume 2, pp.6-11
Zhang D., Miao X., and Mao X. (2001).Simulation on Roof Activities of Gob-Side Entry Retaining in Fully-Mechanized Top-Coal Caving Faces. Journal of China University of Mining and Technology. Volume 30, pp.261-264
