ABSTRACT

Potential rock deposits in Thailand are evaluated using the numerical rating technique. Implied rating factors on these rock deposits are rock resources characteristics, resources economics, and the optimal method of development. For ongoing quarries, the controlled impacts during blast excavations are also suggested. Both techniques on the numerical evaluation and the optimized blast impacts seem to have great benefits for the quarry planning on economic and environmental concerns.

INTRODUCTION

Three major types of crushed rocks in Thailand have been used for construction purposes. These are Permian-Ordovician limestone, Cretaceous granite and Tertiary basalt. Potential resources sites and the Ongoing quarries are located in various regions. Large size quarries are in the northeast side of Bangkok, approximately 100 km.

The size of quarry is defined as the large size when Its production exceeds a limit of 200,000 cubic meters All month, otherwise it is classified as the small size. All quarries of large sizes are limestone quarries and their fragments are mainly used as a raw product in the portland cement industry.

MANAGEMENT PLAN FOR ROCK MATERIALS

Since Thailand is the developing country, the Mining Technology Division has drawn up the management plan for rock product using in the construction industry. The plan was based on three principal data: the volume of market demand, the volume of rock reserve, and the production capacity of rock materials.

A long term of consumption prediction of crushed racks is initiated. Figure 1 is the predicted graph of rack consumption in the next 20 years. Variables are mainly of the economic growth and the assumed Weight factor for construction project. Two lines of predicted consumption are shown in concurrent with the predicted line of population in Thailand.

The variations in prediction of these 2 lines are due to one uses different input variables. However, their variations are in acceptable limits.

The consumption trend of rock materials used in the construction industry is about 123.6 million (metric) tons for the year 1999. This consumption rate is increasing sharply until the year 2019, the maximum consumption is 360.2 million tons. When one calculates the rate of consumption per person, Thailand has the rate of using rock materials in the year 2003 is 3.2 tons/person. This consumption rate is close to those of Canada and Germany but it is higher than Japan and South Korea.

From relevant data and from our research team findings (Tangchawal et al., 2000) the rock reserves and the production capacity within a 20 year period are in

(Figure in full paper)

good trends for the most part. Only a few provincial areas that there will be lack of the rock materials in a short time. This problem can be subdued by using the granite (or basalt) aggregate instead of the limestone aggregate.

Figure 2 illustrates the location map of rock deposits and operated quarries which our research projects are carried out.

EVALUATION AND RESOURCES RATING

Evaluating at various sites of selected rock resources are our main purposes.

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