波兰西南部苏台德山脉兹洛蒂斯托克前砷金矿地下旅游路线空气中氡及其子体的行为。

Radon and its daughter products behaviour in the air of an underground tourist route in the former arsenic and gold mine in Złoty Stok (Sudety Mountains, SW Poland).

作者信息

Przylibski T A

机构信息

Faculty of Mining, Division of Geology and Mineral Waters, Wrocław University of Technology, Poland.

出版信息

J Environ Radioact. 2001;57(2):87-103. doi: 10.1016/s0265-931x(01)00012-1.

DOI:10.1016/s0265-931x(01)00012-1

PMID:11545384

Abstract

This paper describes the occurrence of radon and its daughter products in the accessible workings, partially open to the public, in the former arsenic and gold mine in Zloty Stok. The geology of the area and the characteristics of the workings provide the background for explanation of the genesis of radon and its daughter products and of the spatial and temporal variations in their concentrations. The results demonstrate that well-ventilated areas along the tourist route have the lowest values of all the measured parameters and that temporal variations of these parameters are irregular. The highest concentration values for radon (up to 18.50kBq/m3) and its daughter products (up to 14.49kBq/m3) have been recorded in the workings with obstructed natural ventilation. These are the areas where seasonal oscillations in the concentrations of these isotopes have been registered, with the maxima in summer and the minima in winter. These sections of the workings are inaccessible to the casual visitor. Radon is supplied to the workings from the side walls and its concentration is influenced, most of all, by ventilation and the degree of rock fissuring. The reason is the uniform and not very high content of 226Ra in the rocks where the galleries were excavated. Only locally, in the workings of the Gertruda adit lying outside the tourist route, do open fault zones have significant influence on enhanced concentrations of radon and its daughter products. These fault zones constitute effective routes of radon migration to the workings. In spite of this, it must be stated that neither guides nor tourists are exposed to excessive concentrations of radon or its daughter products in the tourist route area. However, the extension of the route to other workings will require the introduction of forced ventilation in order to lower theconcentration of radon and its daughter products. reserved.

摘要

本文描述了位于兹洛托斯托克的前砷金矿中部分向公众开放的可进入作业区中氡及其子体的存在情况。该地区的地质情况和作业区特征为解释氡及其子体的成因以及它们浓度的时空变化提供了背景。结果表明，沿着旅游路线通风良好的区域所有测量参数的值最低，并且这些参数的时间变化不规则。在自然通风受阻的作业区记录到了氡（高达18.50kBq/m³）及其子体（高达14.49kBq/m³）的最高浓度值。这些区域记录到了这些同位素浓度的季节性振荡，夏季最高，冬季最低。这些作业区部分普通游客无法进入。氡从侧壁进入作业区，其浓度主要受通风和岩石裂隙程度的影响。原因是开凿巷道的岩石中²²⁶Ra含量均匀且不高。仅在旅游路线外的格特鲁达平巷作业区局部，开放断层带对氡及其子体浓度的升高有显著影响。这些断层带构成了氡向作业区迁移的有效通道。尽管如此，必须指出的是，在旅游路线区域，导游和游客都不会暴露于过高浓度的氡及其子体中。然而，若将路线延伸至其他作业区，则需要引入强制通风以降低氡及其子体的浓度。保留。