Spray-prevention trial and rock-breaking simulation of a static cracking agent

被引：0

作者：

Chen W. ^{[1
]}

Wu P. ^{[1
]}

Yu H. ^{[2
]}

Xu G. ^{[1
]}

Sun H. ^{[1
]}

Li X. ^{[1
]}

Tai H. ^{[1
]}

机构：

[1] College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin

[2] Heilongjiang Longmay Jixi Mining Co. Ltd., Jixi

来源：

Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | 2021年 / 42卷 / 09期

关键词：

Cylindrical charge; Expansion pressure; Hydrated adjustments; Numerical simulation; Spray prevention; Static cracking agent;

D O I：

10.11990/jheu.202007128

中图分类号：

学科分类号：

摘要：

Hydrated adjustments and the cylindrical charge method based on the swelling and spraying mechanisms were proposed to address the expansion pressure loss of a static cracking agent due to the spray orifice. The expansion pressure was then measured. Rock breaking was simulated via the trial breaking of a concrete specimen, and the corresponding cracking process was analyzed by numerical simulation. Results indicated that hydrated adjustments for the static cracking agent would cause greater losses in expansion pressure and that the cylindrical charge could decelerate water loss and provide an expansive pressure of 62.30 MPa, which accounts for 94.38% of the theoretical value. The cylindrical charge method could effectively crack rocks and prevent spray. The simulation results agreed well with the trial findings. This work provides an economical and high-efficiency approach for engineering design. © 2021, Editorial Department of Journal of HEU. All right reserved.

引用

页码：1295 / 1302

页数：7

共 18 条

[1] HUANG Yaoqiang, Application of soundless cracking agent with high efficiency in the excavation of rock crushing around urban high-risk pipelines, Construction technology, 44, S2, pp. 139-141, (2015)
[2] PIAO Zhanhua, Study on the application of static blasting technique for deep foundation pit in adjacent commercial district, Highway traffic technology (applied technology version), 15, 8, pp. 205-207, (2019)
[3] WANG Zhiyong, Study on the influence of composition of static demolition agent on its properties, (2008)
[4] SHI Huisheng, Study on the intrinsic properties of microstructure of free calcium oxide and its influence on the physical properties of hardened cement slurry, (1993)
[5] LIU Jiaping, GUO Shu, TIAN Qian, Et al., Hydration kinetics of CaO expansion clinker, Journal of building materials, 17, 1, pp. 15-18, (2014)
[6] LAI Xingping, LI Linyao, SHAN Pengfei, Et al., Effect testing of static crack agent (SCA) for top-coal weakening in extremely steep coal seams, Journal of Xi'an University of Science and Technology, 33, 2, pp. 127-130, (2013)
[7] XIE Yisheng, YANG Guanghui, HUANG Xiaopeng, Experimental research on mechanical properties of static breaking agents, Safety in coal mines, 50, 3, pp. 9-12, (2019)
[8] SUN Lixin, Study on the static cracking agent and its application, (2005)
[9] (1991)
[10] WANG Yujie, Research on mechanism and technology of non-explosive demolition, (2009)

← 1 2 →