Experimental study on the joint application of innovative techniques for the improved drivage of roadways at depths over 1 km: a case study

• Autorzy: Zhang Wei , Tang Jia-Jia , Zhang Dong-Sheng , Zhang Lei , Sun Yuyan , Zhang Wei-Sheng

Identyfikatory

DOI

10.24425/ams.2020.132713

• Języki publikacji: EN

Abstrakty

EN

Finding effective ways to efficiently drive roadways at depths over 1 km has become a hotspot research issue in the field of mining engineering. In this study, based on the local geological conditions in the Xinwen Mining Area (XMA) of China, in-situ stress measurements were conducted in 15 representative deep roadways, which revealed the overall tectonic stress field pattern, with the domination of the horizontal principal stresses. The latter values reached as high as 42.19 MPa, posing a significant challenge to the drivage work. Given this, a comprehensive set of innovative techniques for efficiently driving roadways at depths over 1 km was developed, including (i) controlled blasting with bidirectional energy focusing for directional fracturing, (ii) controlled blasting with multidirectional energy distribution for efficient rock fragmentation, (iii) wedge-cylinder duplex cuts centered on double empty holes, and (iv) high-strength supports for deep roadways. The proposed set of techniques was successfully implemented in the –1010 west rock roadway (WRR) drivage at the Huafeng Coal Mine (HCM). The improved drivage efficiency was characterized by the average and maximum monthly advances of 125 and 151 m, respectively. The roadway cross-sectional shape accuracy was also significantly improved, with the overbreak and underbreak zones being less than 50 mm. The deformation in the surrounding rock of roadway (SRR) was adequately controlled, thus avoiding repeated maintenance and repair. The relevant research results can provide technical guidance for efficient drivage of roadways at depths over 1 km in other mining areas in China and worldwide.

Słowa kluczowe

EN

roadways at depth over 1 km; in-situ stress measurements; efficient drivage; rapid drilling and blasting; deformation control of SRR; industrial test

PL

pomiar naprężeń; wiercenie; piaskowanie; odkształcenie

• Wydawca: Instytut Mechaniki Górotworu PAN
• Czasopismo: Archives of Mining Sciences
• Rocznik: 2020
• Tom: Vol. 65, no. 1
• Strony: 159--178
• Opis fizyczny: Bibliogr. 49 poz., fot., rys., tab., wykr.

Twórcy

autor

Zhang Wei

• China University of Mining and Technology, State Key Laboratory of Coal Resources and Safe Mining, Xuzhou 221116, China
• China University of Mining and Technology, School of Mines, Xuzhou 221116, China

autor

Tang Jia-Jia

• China University of Mining and Technology, School of Mines, Xuzhou 221116, China

autor

Zhang Dong-Sheng

• China University of Mining and Technology, State Key Laboratory of Coal Resources and Safe Mining, Xuzhou 221116, China
• China University of Mining and Technology, School of Mines, Xuzhou 221116, China

autor

Zhang Lei

• China University of Mining and Technology, School of Mines, Xuzhou 221116, China

autor

Sun Yuyan

• China University of Mining and Technology, School of Mines, Xuzhou 221116, China

autor

Zhang Wei-Sheng

• China University of Mining and Technology, School of Mines, Xuzhou 221116, China

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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020)