Progress of heat-hazard treatment in deep mines

Yang, Xujing; Qiaoyun, Han; Jiewen, Pang; Shi, Xiaowei; Hou, Dinggui; Liu, Chao

doi:10.1016/j.mstc.2011.02.015

Cited by 41 publications

(13 citation statements)

References 2 publications

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“…The author stated that the differences can be attributed, in part, to the "un-auditable" inherent design and manufacturing quality, or unverifiable data on the size-selective sampling curve. Moreover, humidity (24) and air density (25) in the deep mine conditions, and thus the Reynolds number, deviate from surface conditions. In combination with the practice of on-surface calibration, this provides theoretical reasons for doubting compliance of the sampling with the respirable convention (26,27).…”

Section: Reliability Of Collected Datamentioning

confidence: 99%

Can the South African Milestones for Reducing Exposure to Respirable Crystalline Silica and Silicosis be Achieved and Reliably Monitored?

Brouwer

Rees

2020

Front. Public Health

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Silicosis and other respirable crystalline silica-associated diseases, most notably tuberculosis, have long been substantial causes of morbidity and mortality in South Africa. For the mining and non-mining industries, silicosis elimination programmes have been developed with milestones regarding reduction of levels of exposure to respirable crystalline silica (RCS) and targets regarding the date of eradication. The present paper explores the feasibility of achieving these targets by investigating the evidence that levels of exposure and silicosis incidence rates have declined by an appraisal of the methods for data collection and reporting. In the mining industry the silicosis elimination programme is supported by the development and advocacy of leading practices to reduce the exposure. RCS exposure data are routinely collected according to a Code of Practice (CoP) and the results are reported to the Mine Health and Safety Inspectorate. As the CoP and the actual workplace practices have been demonstrated to have some flaws, there is some concern about the accuracy of the actual exposure data and the data interpretation. The annually reported levels of exposure suggest a decline, however, the actual levels of RCS as well as the number of exposed workers, were not reported over the last few years. With regard to the silicosis incidence rates, a steady decline of new cases is reported. However, there is a risk of under-diagnosis and-reporting especially in former miners. In the non-mining industries, a systematic baseline of RCS exposure levels and silicosis incidence is lacking. The reporting by industries on assigning of the workforce to exposure categories seems to be fragmented and incomplete. Consequently, any evidence of progress toward achieving the silicosis elimination target cannot be documented. Both the silicosis elimination target and the exposure milestone are aspirational but are unlikely to be achieved. Nevertheless, the formal mining industry may get close. Exposure control interventions, especially in the non-mining industries, should be developed and implemented and pragmatic methods need to be put in place to identify sources of new silicosis cases for targeted intervention.

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Section: Reliability Of Collected Datamentioning

confidence: 99%

Can the South African Milestones for Reducing Exposure to Respirable Crystalline Silica and Silicosis be Achieved and Reliably Monitored?

Brouwer

Rees

2020

Front. Public Health

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“…us, the circumjacent tangential stresses, displacement, broken areas, and radius of the plastic zone of the roadway grow, affecting the safety of the roadway [2][3][4] and causing severe heat damage of the deep roadway [1][2][3][4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

A New Heat Insulation Shotcrete Mixed with Basalt and Plant Fibers

Huang

Pang

Liu

et al. 2019

Advances in Civil Engineering

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An orthogonal set of experiments was performed on common shotcrete, where the coarse and fine aggregates were substituted with ceramsite and pottery sand, while basalt and plant fibers were also added. The influence of ceramsite, pottery sand, basalt fiber, and plant fiber on the mechanical properties and thermal conductivity of shotcrete was investigated, and the relevant mechanisms were analyzed using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results showed that the admixtures formed a stable state in the concrete matrix when the coarse and fine aggregates were substituted by 5 mass% of ceramsite and 10 mass% of pottery sand, respectively, and with 0.15 and 0.2 vol.% basalt fiber and plant fiber, respectively. At this point, the cement hydration was normal, and the strength of the concrete was relatively higher than other groups. The ceramsite and pottery sand formed a uniformly distributed porous structure in the concrete matrix, thereby reducing the thermal conductivity of the concrete.

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“…In some coal mines with a mining depth beyond 1000 m, the dry bulb temperature at the working face can reach 40 °C and the relative air humidity is up to 90%~100% [1]. Heat hazards to miners at the working face in underground hot coal mines in China have been therefore becoming more severe these years [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Experimental evaluation of heat and moisture transmission characteristics of the working ensemble of hot coal mines using the thermal manikin

Tong¹,

Guo²,

Kang³

et al. 2017

IJHT

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In this paper, the thermal transmission capability (thermal insulation) and the moisture transmission characteristic (evaporative resistance) of the working ensemble for Chinese hot coal miners (from Jining Anju coal mine, a typical hot coal mine in China) were measured and analyzed using a thermal sweating manikin ("Newton") in a climatic chamber. It is found that the thermal insulation of the old (used) mining ensemble worn for one year changes slightly from the new one, but the evaporative resistance decreases about 15%; there are notable differences of local thermal insulation and local evaporative resistance of the mining ensemble among different body zones; the thermal insulation and the evaporative resistance of the mining ensemble change slightly under different thermal conditions, but vary significantly under different humid conditions. The measured data of thermal insulation and the evaporative resistance can provide technical and data support for mining ensemble design, and also are valuable data for evaluating thermal strain of workers in hot coal mines.

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Progress of heat-hazard treatment in deep mines

Cited by 41 publications

References 2 publications

Can the South African Milestones for Reducing Exposure to Respirable Crystalline Silica and Silicosis be Achieved and Reliably Monitored?

Can the South African Milestones for Reducing Exposure to Respirable Crystalline Silica and Silicosis be Achieved and Reliably Monitored?

A New Heat Insulation Shotcrete Mixed with Basalt and Plant Fibers

Experimental evaluation of heat and moisture transmission characteristics of the working ensemble of hot coal mines using the thermal manikin

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